1. The Baltic Sea Anomaly
In 2011, a team of Swedish divers discovered a massive, circular formation about 300 feet below the Baltic Sea. It looks eerily like a crashed spaceship, measuring roughly 60 meters wide. Despite sonar scans and multiple dives, no one can agree on what it is—some claim it’s natural rock, others say it’s man-made. To this day, the Baltic Sea anomaly remains one of the most mysterious underwater findings ever recorded.
